Re: How big solar panels do i need?
Your on the right track, but on the wrong train. I can't write a lot this morning, but here a Couple of crucial points. First, watts are measure of power. 100 watts i00 watts (and 100 WH is 100 WH) regardless of system voltage, Volts*Amps=Watts.
Change the voltage or the curreent and the number changes. 12v *10 amps=120 watts, Or 120v*1amp=120 watts.
Next, solar panels rarely if ever it it thier rtes it put. A basic derate of 20% is a good starting place. So a 100 watt panel , one could use ~80 watts as a calc. Base line.
Finally , it takes ~20% more power to recharge a. Battery than that battery can deliver, So a 100 WH draw will take _~120 WH to recharge. Gotta go. I'm sure 'coot and bill will keep the conversation going.
Please note, being a moderator does not add any weight to my opinions 300 watts Siemens/BP panels,plus a Sun 90,, making ~400. ~30 amps into Rogue MPT-3024, 450 ah of Trojan T-105, Morningstar ts300 inverter, a Tri-Metric meter.a collection of antique generators, plus 2 Honda eu-1000i's (also a BS2512 IX controller) and assorted other stuff!